Sub assemblies becoming dissolved in parts only BOM in SolidWorks

Hi all

I am attempting to create a parts only BOM in the drawing of a large assembly that consists of several parts and sub assemblies. I use the promote feature in the configurations manager of sub assemblies to get part balloons to refer to sub assemblies and not to their parts.

For some reason, the sub assemblies do not show up in the BOM, and show a "Dissolved in BOM" flag next to them in the feature tree manager.

Right clicking the sub assembly and selecting restore to BOM in the drawing does not actually restore the sub assembly to the BOM, and also changes the promote child components setting back to show.

Does anyone have any ideas on how to restore these sub assemblies to the BOM and keep them set to promote child components?

Thanks
Malan